Details
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Bug
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Status: Resolved
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Major
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Resolution: Fixed
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None
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None
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None
Description
Reproduction Steps:
1. Go to Admin->Manage Ambari
2. Create a group with a few users belonging to it.
(I have created "mygroup" with "user1", "user2", "user3")
(attachments "user1.tiff", "mygroup.tiff" shows samples)
3. Go to Clusters->Roles on the left navigation menu.
4. The default view is the "Block" view for the roles. Assign "mygroup" a role, say "Cluster User".
(attachment "block_view_original.tiff")
5. Click on "List" view, it will show Users by default. It correctly shows the role "Cluster User" for each user in "mygroup".
(attachment "list_view_users.tiff")
6. Now, try adding a new Role, say "Service Operator", to one of the users, say "user3".
(attachments "list_view_add_role_to_user_step1.tiff", "list_view_add_role_to_user_step2.tiff")
7. After making this change, the role gets added for that user (in our case "user3"), but the roles from other users in its group gets removed. Also, the previous role for the user ("user3") is replaced by the new Role.
(attachment "list_view_add_role_to_user_step3.tiff")
8. You can confirm this from the the "Block" view.
(attachment "block_view_after_step3.tiff")
So, the problem here lies with the List view where it is not able to process the changes in the Roles correctly. A change in the Role of a user causes the following:
CASE-1: The displayed role (effective privilege) comes from an explicitly assigned role to the user.
1.1) The new selected role correctly replaces the existing privilege that was explicitly assigned to the user.
1.2) But if the user was assigned multiple roles explicilty (before the fix for AMBARI-16102 got pushed in), then all the other roles, which are of lower privilege than the role that got replaced, are still displayed in the Block view (because those roles are still in the database). So, if the new selected role happened to be of a lower privilege than and existing role of the user, then even though the user sees a success Alert message, the effective privileg he sees is different. For the Ambari user, this behavior is not easily understandable.
CASE-2: The displayed role (effective privilege) comes from a group the user belongs to.
2.1) If the new selected privilege is higher than the effective privilege coming from the user's group(s), then the newly selected role replaces this "group" privilege in the database, insetad of creating a new entry.
2.2) As a result of losing the group privilege, all the group members also lose their privileges and they show "None" as their effective privilege.
2.3) If the newly selected privilege is lower than effective group privilege, the Alert message shows a success of role change but the effective privilge is still not the one that the Ambari user selected.
Expected results:
1. Updating a Role of a user must replace any/all of the explicit roles it has been assigned through the Block View. (this addresses 1.2)
Note: Even though AMBARI-16102 has attempted to fix the Block view by allowing only a user to have just one role assigned to it, there could be cases where the earlier version of Block view has already allowed users to have multiple roles. So, taking this into consideration, the fix must address removing any or all of the roles the user was assigned explicitly.
2. Adding a Role to a user must not affect the Roles of other users in its group. (addressing 2.1 and 2.2)
3. Selecting a "NONE" for a user role shows the Alert "User's role chnaged to None". This may not reflect the correct privilege status as the user might have some effective privilege coming from its group(s). In the fix, the Alert must show the relevant message.
4. Alert messages must show more informative messages of what is happening with the user's privileges and why. (addressing 1.2 and 2.3)
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Attachments
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